Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 169, NWS Fort Worth, TX

May 5, 2009Tarrant County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 5, 2009, 11:20 PM CDT for Tarrant County, Texas. It was in force for 22 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 5, 2009, 11:20 PM CDT (04:20 UTC)
Expired: May 5, 2009, 11:42 PM CDT
In force: 22 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Tarrant County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 22 km from the middle of the area, began a volume at 04:22 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.3 hours before the alert went out and 7 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2348 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 367 m²/s²
Significant tornado parameter: 5.0
Supercell composite: 16.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 11:11 PM CDT, 9 minutes earlier.

Area forecast discussion, May 5, 11:11 PM CDT, 9 minutes before

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Hazardous weather outlook, May 5, 10:07 PM CDT, 1 hour 13 minutes before

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In the hours before

Local storm report, May 5, 8:14 PM CDT, 3 hours 6 minutes before

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Local storm report, May 5, 8:31 PM CDT, 2 hours 49 minutes before

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Special weather statement, May 5, 9:03 PM CDT, 2 hours 17 minutes before

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Special weather statement, May 5, 10:20 PM CDT, 1 hour before

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Local storm report, May 5, 10:42 PM CDT, 38 minutes before

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Local storm report, May 5, 11:09 PM CDT, 11 minutes before

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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 5, 7:06 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto, Stephens	54 min
May 5, 7:58 PM CDT	Severe Thunderstorm Warning	FWD	Eastland, Erath, Palo Pinto, Stephens	62 min
May 5, 9:03 PM CDT	Special Weather Statement	FWD	Erath	27 min
May 5, 10:20 PM CDT	Special Weather Statement	FWD	Wise	25 min
May 5, 10:34 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Parker, Tarrant, Wise	56 min
May 6, 4:33 AM CDT	Special Weather Statement	FWD	Grayson	27 min
May 6, 4:48 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	57 min
May 6, 4:55 AM CDT	Special Weather Statement	FWD	Fannin	35 min
May 6, 5:04 AM CDT	Severe Thunderstorm Warning	FWD	Cooke	43 min
May 6, 5:24 AM CDT	Severe Thunderstorm Warning	FWD	Fannin	66 min
May 6, 5:33 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Grayson	57 min
May 6, 5:43 AM CDT	Severe Thunderstorm Warning	FWD	Lamar	62 min
May 6, 5:52 AM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Hunt	53 min
May 6, 6:15 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Rockwall	60 min
May 6, 6:42 AM CDT	Severe Thunderstorm Warning	FWD	Hopkins, Hunt, Kaufman, Rains, Van Zandt	63 min
May 6, 6:52 AM CDT	Flash Flood Warning	FWD	Fannin, Grayson	3 hr
May 6, 7:50 AM CDT	Flash Flood Warning	FWD	Collin, Grayson, Hunt	3 hr
May 6, 8:26 AM CDT	Areal Flood Advisory	FWD	Delta, Hopkins	2 hr
May 6, 9:16 AM CDT	Special Weather Statement	FWD	Fannin	29 min
May 6, 9:45 AM CDT	Areal Flood Advisory	FWD	Fannin	90 min
May 6, 9:50 AM CDT	River Flood Warning	FWD	Hunt	35 hr
May 6, 9:50 AM CDT	River Flood Warning	FWD	Hunt, Rockwall	11 hr
May 6, 10:11 AM CDT	River Flood Warning	FWD	Delta, Hopkins	4 days
May 6, 10:16 AM CDT	River Flood Warning	FWD	Collin	23 hr
May 6, 11:40 AM CDT	River Flood Warning	FWD	Collin	21 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2009 Every severe thunderstorm warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.